A water treatment operation method for enhanced biological denitrification based on optimized utilization of carbon sources

Abstract

The invention discloses a water treatment operation method for strengthening biological denitrification based on optimized utilization of carbon sources, including: separation of influent primary sedimentation tanks, limited increase of C / N; strengthening of endogenous oxygen consumption process; high-quality and low-quality carbon sources Separation and rational utilization; separate different forms of influent water in primary sedimentation tanks and control different hydraulic retention times. This method separates the high-quality carbon source from the low-quality carbon source in the sewage, and rationally allocates and utilizes the low-quality carbon source for the consumption of dissolved oxygen in the reflux of sewage treatment, and uses the high-quality carbon source for the denitrification process of sewage treatment. The efficiency of biological denitrification can be significantly improved under the condition of adding or limited carbon source. By controlling the different forms of water separation in the primary sedimentation tank, the colloidal carbon source can be flocculated and precipitated, and the inferior carbon source in the sewage is further separated from the sewage. By controlling different hydraulic retention times, the low-quality carbon source can fully contact with the internal reflux dissolved oxygen to ensure the elimination of dissolved oxygen and avoid competition between dissolved oxygen and denitrification for high-quality carbon sources.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a method for optimizing the utilization of carbon sources, eliminating internal backflow dissolved oxygen, and improving the biological denitrification process by adjusting the operation mode of water treatment. Background technique [0002] In recent years, the water quality and quantity characteristics of municipal sewage have changed significantly, and the nitrogen and phosphorus content in sewage have increased significantly. Relevant departments have become more stringent in the supervision of the operation of sewage treatment plants. Because of its own deficiency, it has become a difficult problem for research and improvement. From the previous level B to level A and then to the quasi-IV category, from the removal of carbon and phosphorus to the removal of nitrogen and phosphorus as the core, national standards and local standards have continuously raised the requirements for ...

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Problems solved by technology

[0005] For the problem of low biological denitrification efficiency, we use the method of limitedly increasing C / N, introducing endogenous oxygen consumption process at the front end of the anoxic section, and optimizing the use of high-quality and low-quality carbon sources to eliminate dissolved nitrogen in the internal reflux. Oxygen to ensure sufficient carbon source for denitrification, thereby improving the denitrification effect

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